Simulated potentiometric surface contours at end of simulation (1998) in model layer 1 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California

These contours represent the simulated potentiometric surface at the end of simulation (1998) in model layer 1 of the Death Valley regional ground-water flow system (DVRFS), an approximately 45,000 square-kilometer region of southern Nevada and California. The numerical ground-water flow model simulates prepumping conditions before 1913 and transient-flow conditions from 1913 to 1998 after pumping of ground water began. The DVRFS transient ground-water flow model is the most recent in a number of regional-scale models developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada (see "Larger Work Citation", Chapter A, page 8, for details).

这些等值线展示了死亡谷区域地下水流动系统（Death Valley Regional Ground-Water Flow System, DVRFS）第1模型层在模拟结束时刻（1998年）的模拟测压水面（potentiometric surface）。该系统是一处位于美国内华达州南部与加利福尼亚州境内、总面积约45000平方千米的研究区域。该数值地下水流动模型模拟了1913年地下水抽水活动启动前的无抽水稳态条件，以及1913年至1998年抽水启动后的瞬态流动条件。DVRFS瞬态地下水流动模型是美国地质调查局（U.S. Geological Survey, USGS）为美国能源部（U.S. Department of Energy, DOE）开展内华达试验场（Nevada Test Site, NTS）与内华达州尤卡山相关调查所开发的一系列区域尺度模型中的最新版本，详细信息可参见《大型成果引用》（Larger Work Citation）A章节第8页。